<template>
  <div class="app-content">

    <!-- 顶部 Header 区域 -->
    <mt-header fixed title="vue项目">
      <span slot="left" @click="goBack" v-show="flag">
        <mt-button icon="back">返回</mt-button>
      </span>
    </mt-header>

    <!-- 中间的路由 router-view 区域 -->
    <transition>
      <router-view></router-view>
    </transition>

    <!-- 底部 Tabbar 区域 -->
    <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-lww" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-lww" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-lww" to="/shopcart">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">
          {{$store.getters.getAllCount}}
        </span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-lww" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
    
  </div>
</template>

<script>
export default{
  data(){
    return{
      flag:false
    }
  },
  created(){
    this.flag=this.$route.path==='/home'?false:true;
  },
  methods:{
    goBack(){
      // 点击后退
      this.$router.go(-1);
    }
  },
  watch:{
    '$route.path':function(newVal){
      if(newVal==='/home'){
        this.flag=false;
      }else{
        this.flag=true;
      }
    }
  }
}
</script>

<style lang="scss" scoped>
  .mint-header{
    z-index: 99;
  }
  
  .app-content{
    padding-top: 40px;
    padding-bottom: 50px;
    overflow-x: hidden;
  }

  .v-enter{
    opacity: 0;
    transform: translateX(100%);
  }

  .v-leave-to{
    opacity: 0;
    transform: translateX(-100%);
    position: absolute;
    // top: 40px;
  }

  .v-enter-active,.v-leave-active{
    opacity: 1;
    transition: all .5s ease;
  }

  // 改类名解决tabbar点击无法切换的问题
  .mui-bar-tab .mui-tab-item-lww.mui-active {
    color: #007aff;
  }

  .mui-bar-tab .mui-tab-item-lww {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
  }

  .mui-bar-tab .mui-tab-item-lww .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
  }

  .mui-bar-tab .mui-tab-item-lww .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
  }
</style>